Mine-gate.



N6. 718,138. PATENTBD JAN. 13, 190s.

J. M. MARTY. Y

' MINE GATE. x APPLIOATION `Hmm SEPT. 1o, 1902.

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PATBNTED JAN. 13, 1903.

MINE GATE. v APLLIUATION FILED SEPT. l0, 1902.

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a Arnim JOI-IN M. MARTY, OF CLEVELAND,

OI-IIO, ASSIGNOR OF ONE-HALF TO CHARLES J. DIEBOLD, OF CLEVELAND, OHIO.

MINE- GATE.

SEEGIFICATION forniing` part of Letters Patent No.` 718,138, dated January 13, 1903.

Application led September 10, 1902. Serial No. 122,812. (No model.) l

T0 all whom, it may concern:

Be it known that I, JOHN M. MARTY, a citizen of the United States, residing in Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Mine-Gates; and I do hereby declare the following to be a full, clear, and exact description of my invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

My invention relates to improvements in gates for mines, such as are adapted to cut oft or control currents of air in tunnels and are automatically opened and closed as the car approaches' or leaves the gate. The gate I have adopted is of the folding type; and the object of my invention is to provide a simple and efficient mechanism for raising and lowering it. I accomplish this by providing an additional rail and raisingit above the track-rail a sufficient distance on either side of the gate and holding it in the raised position so long as it is desired to keep the gate lowered. This additional rail is held in its raised position by means of weights and levers, the weights being of such size that the weight of the car will by Voverbalancing the weights lower the secondary rail and raise the gate, as hereinafter more fully described.

In the accompanying drawings, Figure lis a side elevation showing the curtain lowered. Fig. 2 is an end view at line a: in Fig. l.`

Fig. 3 is a side elevation of one end, showing f the position of the parts when the curtain is raised. Fig. 4 is a plan view of the part shown in Fig. 3. i

A A are the usual track-rails. C and C2 are rails mounted above one of the rails A and pivotally connected to the short sections of rail C' C3. These rails are herein referred to as secondary rails. The outer ends of the secondary rails C and C3 are pivotally connected to the lugs a, which are rigidly fastened to the trackrail A.

D and D are weighted levers pivoted at di `on the ends of the levers DD are suiiciently heavy to raise the secondary rails above the track-rail, except when the weight of the car is upon them, as indicated by dotted lines in Fig. 3.

B, B, and B2 are posts of a frame for supporting the curtain and the parts upon which it is mounted.

l) and b' are vertical iron bars extending from the lower part of the frame to the top of the posts B' B2, asshown in Fig. 3.

' Near the top of the post B2 are mounted the segments K and L, the teeth of which mesh, also shown in Fig. 3. The arm d of the lever D is connected to the segment K by means of the rod G, Figs. l and 3. The arm (l of the lever D is also connected through the connecting-rod E to the lever F, which is pivoted atf. The rod I-I connects the lower end of the arm F to the arm of the segment L. The rods I and .I connect the pivoted levers F and F', so that the secondary rails on both sides of the gate will be lowered and the curtain raised as the car approaches from either side. It would be practicableto make the rods Gr and I of sufficient strength to either raise or lower the curtain; but I prefer to use two rods of lighter Weight, which I am able to do by alternate pulling on the segments K and L. The guides c2 c2 tit into the correspending parts a2 a.' to prevent lateral motion of the secondary rail.

O is a folding curtain mounted between two sets of socalled lazy-tongs, the upper section of each set being attached to the upper pole of the curtain, while the lower section of each set is attached to the lower pole of the curtain. The lower pole of the curtain slides up and down between'the posts B B2 andthe bars b and b as the lazy-tongs are eX- tended or drawn together. On the inner side of the segment K is an arm M, Figs. 2 and 4, the outer end of which is connected to the upper section of the lazy-tongs P.

The rod M2 passes throughthe upper end of the frame and is provided at the opposite end with the arm M', the outer end of which is connected to the upper section of the lazytongs P', both the arms M and M' being rigidly fastened to the rod M2.

It will be understood that when the Weight of the car isnot present on the secondary rails the weights on theends of the levers D D' will raise these rails, and as the arm d of the lever D is raised by the descending weight it will, through the connecting-rods, turn the segments K and L, so as to lower the curtain by extending the lazy-tongs on either side of it. This is the normal position of the apparatus until as the car approaches from either end its weight comes upon the secondary rail and forces it downward against the power of the weighted levers and through the parts connected thereto contracts the lazy-tongs, raising the curtain. The curtain remains raised until the car has passed off the secondary rail at the other side of the gate. As the car leaves the secondary rail the weighted levers again raise the rail and through the operative connection with the curtain lowerit. The rails C and C2 overlap each other, and the weight of the car as it passes through the gate produces suflicient friction between them to prevent the weighted levers from lowering the curtain.

will lower the curtain as the car is removed, substantially as set forth.

2. In amine-gate, the combination with the track-rail, of secondary rails on each side of the gate, weighted levers attached to the secondary rails, a curtain mounted in a frame and operated bya pair of lazy-tongs, and rods for connecting the secondary rails and weighted lever to the lazy-tongs, whereby the curtain is raised as the car approaches the gate and is lowered as the car leaves the gate, substantially as shown and described.

3. In a mine-gate, the combination with the track-rail A of the secondary rails C, C', the weighted lever D, the curtain O, the lazytongs P P', the arms M, M' mounted on the rod M2, the segments K and L, the lever F and the connecting-rods G, E and H, all for raising the curtain as the car approaches the gate and lowering the gate as the car is removed therefrom, substantially as and for the purpose specified.

4. In a mine-gate, the combination with the track-rail A of the secondary rails C, C', C2 and C3, the levers D and D', the curtain O, the lazy-tongs P, P', the arms M, M', the rod M2, the segments K and L, the levers F and F', and the rods E, G, H, I and J, all substantially as and for the purpose specified.

In testimony whereof I hereunto set my hand, at Cleveland, Ohio, in the presence of two witnesses, this 5th day of September, 1902.

JOHN M. MARTY.

Witnesses:

CHAS. J. DIEBOLD, B. SEP. 

